fix: Python.exe sometimes dont shut down in task manager processes

fix: disconnect attempt when the session is not running

Related to slumber/multi-user#94

multi_user/__init__.py

@@ -47,7 +47,8 @@ from . import environment, utils
 DEPENDENCIES = {
     ("zmq","zmq"),
     ("jsondiff","jsondiff"),
-    ("deepdiff", "deepdiff")
+    ("deepdiff", "deepdiff"),
+    ("psutil","psutil")
 }
 
 

multi_user/operators.py

@@ -219,9 +219,9 @@ class SessionInitOperator(bpy.types.Operator):
 
         client.init()
 
-
         return {"FINISHED"}
 
+
 class SessionStopOperator(bpy.types.Operator):
     bl_idname = "session.stop"
     bl_label = "close"
@@ -234,12 +234,15 @@ class SessionStopOperator(bpy.types.Operator):
 
     def execute(self, context):
         global client, delayables, stop_modal_executor
-        assert(client)
 
+        if client:
             try:
                 client.disconnect()
             except Exception as e:
                 self.report({'ERROR'}, repr(e))
+        else:
+            self.report({'WARNING'}, "No session to quit.")
+            return {"FINISHED"}
         return {"FINISHED"}
 
 
@@ -558,6 +561,7 @@ classes = (
 
 )
 
+
 @persistent
 def sanitize_deps_graph(dummy):
     """sanitize deps graph
@@ -594,7 +598,6 @@ def register():
     for cls in classes:
         register_class(cls)
 
-
     bpy.app.handlers.undo_post.append(sanitize_deps_graph)
     bpy.app.handlers.redo_post.append(sanitize_deps_graph)
 
@@ -602,7 +605,6 @@ def register():
     bpy.app.handlers.frame_change_pre.append(update_client_frame)
 
 
-
 def unregister():
     global client
 
@@ -617,7 +619,6 @@ def unregister():
     bpy.app.handlers.undo_post.remove(sanitize_deps_graph)
     bpy.app.handlers.redo_post.remove(sanitize_deps_graph)
 
-
     bpy.app.handlers.load_pre.remove(load_pre_handler)
     bpy.app.handlers.frame_change_pre.remove(update_client_frame)